Mile high skyscrapers

Leonard Bertin.  Target 2067.  Canada's Second Century.  Toronto:  Macmillan of Canada, 1968.

One of the many optimistic predictions made by the "thought leaders" Bertin interviewed for his book.  Currently, the world's tallest building is the Burj Khalifa tower in Dubai, 2,716.5 feet high. So we're halfway to the target!